Stalling at Idle does not restart

[curtie94]

I'll do the quick test tomorrow. I'll report back.

[posplayr]

I'll do the quick test tomorrow. I'll report back.

Those voltages do not sound unreasonable, although when you say "...the voltage drops to about 12-12.5 when it stalls " you mean after the bike quits running?

[curtie94]

Yes after the bike stalls the voltage drops to 12-12.5v

[curtie94]

I'm going to go ahead and pull the carbs. Maybe I have a pilot circuit that is plugged.

That would explain my hanging idle stalling.

[JTGS850GL]

Because of the hanging idle you might want to pay particular attention to the condition of the intake boots and the O-rings between them and the head.

You never did answer the question about what condition the plugs were in when it stalled. Were they wet or dry? Were they black, oil fouled or white?

[curtie94]

When the bike stalls the plugs are golden brown and dry.

I ran it on the on position and when it stalled I left the bike for a few minutes and when I came back it started right up.

So that makes me cross out fuel flow because it got no more fuel after it stalled.

If it was an idle circuit it would act that way all the time at idle.

I'm going to ride it a little bit tomorrow and see what happens.

The intake boots are good and the o rings are new.

[curtie94]

Could fuel level cause my problems.

As in float height. If I have the floats set wrong would it stall.

[curtie94]

Well. I just pulled the carbs and found a broken fuel screw.

Would that cause stalling and then hard starts?

[tom203]

Well. I just pulled the carbs and found a broken fuel screw.

Would that cause stalling and then hard starts?

No, bike should run ok at idle on two cylinders- this business about letting it sit after stalling episode and it restarting is odd. To recap, at the moment it stalls, you've checked for spark, and fuel in bowls and determined that you have both?

[Steve]

Well. I just pulled the carbs and found a broken fuel screw.

Would that cause stalling and then hard starts?

If the broken tip is still jammed in the tiny little port, ... YEAH.

Tom suggests that the bike would still run on two cylinders, but that assumes a proper carb sync in the first place.

.

[curtie94]

Yes when it stalls I have both spark and fuel in the bowls.

I pulled the bowls off today and I halso had a partially plugged pilot jet in cyl 2. so I had tow cylinders that where not getting as much fuel.

I pulled the plugs today as well and two of them where black. 3&4 where black 1&2 where light brown. Cyl 1 had the broken fuel screw and Cyl 2 had the plugged pilot jet.

I know the carbs are synced but if the tip of the fuel screw was broken when I did the sync would it throw it off?

I had to use a pick to remove the old tip, so yes it was still stuck in the carb body.

[JTGS850GL]

You say you had a partially clogged pilot jet. Did you do a PROPER cleaning of the carbs? If the cleaning process was done correctly then there is no reason for a clogged pilot jet. Sounds to me like that's a step that was missed. My suggestion is to start with a fresh rebuild, set the float heights and then re-sync the carbs. Don't try to skip the rebuild part. You'll be chasing your own tail for a long time otherwise.

[Steve]

I know the carbs are synced but if the tip of the fuel screw was broken when I did the sync would it throw it off?

That should not affect it at all.

.

[curtie94]

I did strip and dip the carbs. I actually have done it twice. Once last summer and then again this winter. Maybe I missed something last time.

[tom203]

I can see it running like cr@p with broken off mixture screws and plugged carbs, but this offers no good reason for why it idles ok for a while and then dies/no restart stuff. Or why it eventually starts after recess.
I'm wondering if your ignitor is not triggering plugs on time, i.e. starts out ok, but then timing goes wrong after some running.